STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Polymer & Composites Original Research Special issue

Multi Objective Optimization of Aluminium (AA6061-SiC-Flyash) Metal Matrix Composites using TOPSIS Method

  1. V.V.D. Sahithi Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad
  2. Shishir Kasturi Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad
  3. K. Aruna Prabha Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad
  4. P. Prasad Kumar Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad
  5. PV Elumalai Department of Mechanical Engineering, Aditya University, Surampalem
  6. Pratheeka Dahagam Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad

Abstract

Metal Matrix Composites (MMCs) have significant interest due to their superior mechanical properties, including improved strength, hardness, and fracture resistance. This study investigates the optimization of the mechanical and fracture behaviour of casted AA6061-SiC-Fly Ash (FA) MMCs using the TOPSIS method. Silicon carbide(SiC) and fly ash (FA) reinforcements, with different weight percentages of 5%, 10%, and 15% were fabricated through sand casting method. Total 10 combinations of composites are prepared to understand the impact of reinforcements and their percentages on the mechanical properties. The specimens were evaluated through a series of mechanical characterization tests like Ultimate Tensile Strength (UTS), Impact Strength (IS), and Vickers Hardness (MVH), to evaluate the influence of reinforcement composition on the composite’s strength, toughness, and failure mechanisms. The TOPSIS optimization technique was applied to rank the specimens based on their mechanical performance, facilitating the identification of the optimum composite composition. The results revealed that specimen C9 with FA 5% and SiC 15% exhibited the highest impact strength (86 J) and a favorable combination of UTS (115.2 MPa) and hardness (67.5 Kgf), with 1st rank. The study highlights the critical role of SiC and FA reinforcements in improving the mechanical properties of AA6061-based MMCs, and it offers valuable insights for tailoring the composites for advanced engineering applications.

Keywords

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